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It is a little odd, something funny may be happening around 4.5A
resolution, but it doesn't look too bad. What is the multiplicity?

It might be worth truncating the data to 4.5A or even 5A for
heavy-atom location (but you've probably already tried this)

Phil

Jim Naismith writes:
 > 
 > We are seeing something odd at the ESRF.
 > We are using the 3 x 3 CCD on I29
 > 
 > This is a tough project, we have to find 80 se. This is the peak below.
 > So far no solution from shelxd
 > 
 > Although the R-mrge is OK, we see this dip in CC_anom, for a particular resol
 > range. Is this the xtal or the detector? Does anyone have any suggestions?
 > Data shown below
 > 

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